import os
from sqlalchemy import create_engine
from sqlalchemy.orm import scoped_session, sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from ..config import check_env

check_env()

mysql_url = os.environ.get('MYSQL')
engine = create_engine(mysql_url, convert_unicode=True)

db_session = scoped_session(sessionmaker(
    autocommit=False,
    autoflush=False,
    bind=engine
))

Base = declarative_base()
Base.query = db_session.query_property()


def init_db():
    # import models
    Base.metadata.create_all(bind=engine)
